Why are Michigan's roads so bad?

Why are Michigan's roads so bad?

http://www.wzzm13.com/video/2084056535001/1/Why-are-Michigans-roads-so-badhttp://bcdownload.gannett.edgesuite.net/wzzm/34295214001/34295214001_2084067763001_th-50ee180be4b026544909cc5e-1206954755001.jpg?pubId=34295214001Why are Michigan's roads so bad?Why are Michigan's roads so bad?grandrapidsNews02:02